Hello, I am having a hard time finding examples of analog monochrome posterization online. I am working on ideas for a screen print, and I am looking for a few examples to help me decide what to print. I have found a few examples of analog posterization using multiple colors, but none using tones alone. Also, if anyone has any experience with this process, I could use to ask a few questions. The most important is about the staggered pos/neg sandwiches, and whether or not they are necessary when printing with ink as opposed to on a light-sensitive surface like photo film or paper. It seems that I might be able to get away without doing the sandwiches if I print my lightest tones first. I would like to achieve an effect similar to these gorgeous National Park Service posters: http://www.fordcraftsmanonline.com/servlet/the-WPA-Posters/s/13/Categories. However, these were not done from photographs TMK.